Nusa Penida is an island southeast of Indonesia's island Bali and a district of Klungkung Regency that includes the neighbouring small island of Nusa Lembongan. The Badung Strait separates the island and Bali. The interior of Nusa Penida is hilly with a maximum altitude of 524 metres. It is drier than the nearby island of Bali. There is very little tourist infrastructure.
There are two small islands nearby - Nusa Lembongan and Nusa Ceningan - which are included within the district. Administratively, the kecamatan of the same name, had a population of 45,178 in 2010 census, covering 202.8 km2, very little changed from 10 years prior.